Finding the Fourth Proportional to 31,023.96, 42,813.90 and 16,877.76

Step by Step Solution

1. Step 1: Write the proportion equation
   31,023.96 : 42,813.90 = 16,877.76 : x
2. Step 2: Convert to fraction form
   31,023.96/42,813.90 = 16,877.76/x
3. Step 3: Cross multiply
   31,023.96x = 42,813.90 × 16,877.76
4. Step 4: Simplify right side
   31,023.96x = 722,602,728.86
5. Step 5: Solve for x
   x = 722,602,728.86/31,023.96
6. Step 6: Final answer
   x = 23,291.76